Hi-Flow Cats
#26
Rotary Freak
iTrader: (12)
Originally Posted by BATMAN
It's laughable to see hi-flow cats turn into LO-FLOW cats after a few boosted runs and/or running a rich mixture.
#28
www.silverbulletrx7.com
Originally Posted by moehler
What are you talking about... I've daily driven with my N-tech hi flow cat for 1.5 years at 14 psi and notice no difference from the day I put it on.
As for my old stock unit it was not at all clogged. I think the fact that the HF cat only produced higher numbers above a certain RPM and was EXACTLY the same under that RPM proves that point. If my stock unit was clogged I would expect better numbers across the board.
dis1
#29
www.silverbulletrx7.com
Originally Posted by BATMAN
u might be a lucky one.
I know 2 guys that have been through 2 of them in 6 months running 390rwhp.
Maybe it's the CA gas.
I know 2 guys that have been through 2 of them in 6 months running 390rwhp.
Maybe it's the CA gas.
#30
Rotary Enthusiast
Join Date: Jun 2003
Location: colorado
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ummm whats this loss of low end torque with a midpipe crap? is it true.I talked to a few other people and they said that their cars spool up quicker with a midpipe.Wouldnt this translate to quicker throttle response and much earlier delivery of torque thanx to the faster spool up?
#32
www.silverbulletrx7.com
The dyno plots I have seen comparing midpipes showed loss at the low end and gains at the high end. The gains at the high end are what make it so attractive as they can be substantial.
Basically the rotary needs some back pressure at lower RPM to function optimally.
Basically the rotary needs some back pressure at lower RPM to function optimally.
#34
Rotary Enthusiast
Originally Posted by dis1
The dyno plots I have seen comparing midpipes showed loss at the low end and gains at the high end. The gains at the high end are what make it so attractive as they can be substantial.
Basically the rotary needs some back pressure at lower RPM to function optimally.
Basically the rotary needs some back pressure at lower RPM to function optimally.
#36
Rotary Enthusiast
People need to post more facts instead of I heard this or I know someone comments.
Fact #1: The high flow cat will not give "significant" power increase at the SAME boost level, my dyno test showed only 6 hp difference and it could vary +-5 hp easily from run to run.
Fact #2: The high flow will allow you to run more boost if you have a boost controller. I tried to run 15psi with the stock cat, the boost capped out at 12. By allowing for higher boost the hi flow will help in producing "significant" power increases.
Fact #3: The high flow runs much cooler than the stock cat (by as much as 300 deg F). I measure it with an IR gun.
Fact #4: The exhaust tone is different, better or not depends on the combination you run (High flow and cat back).
Fact #1: The high flow cat will not give "significant" power increase at the SAME boost level, my dyno test showed only 6 hp difference and it could vary +-5 hp easily from run to run.
Fact #2: The high flow will allow you to run more boost if you have a boost controller. I tried to run 15psi with the stock cat, the boost capped out at 12. By allowing for higher boost the hi flow will help in producing "significant" power increases.
Fact #3: The high flow runs much cooler than the stock cat (by as much as 300 deg F). I measure it with an IR gun.
Fact #4: The exhaust tone is different, better or not depends on the combination you run (High flow and cat back).
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ls1swap
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